some more info. I checked distinct values in those two tables. and there are 366,000 records in one table and 5,000 records in another however, the column that is joining to only has 4 distinct values. I added a bitmap index to the columns and its using it on the smaller table.
Im willing to be that is the problem. any possible way to tune a join against such few distinct values > > From: <[EMAIL PROTECTED]> > Date: 2003/11/04 Tue PM 01:34:26 EST > To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]> > Subject: explain plan conundrum > > I cant sql trace it now. I hae run statspack. this query is running now and I dont > want to run another copy with a trace on until this finishes, since I dont want to > suck up resources. Im at a loss as to where the 20 billion rows comes from in this > explain plan? Everything including the indexes are analyzed. > > when the two tables involved have 36k and 5k rows involved. > looks like some form of cartesian join, but its not showing up in the plan. The two > tables are joined by a column. > > any place to look on this? I know I need the 10046 trace, but I cant get that yet > and it make take 12 hours to get it after this runs. > > select col1, > col2, > col3 > from tab1 > tab2 > where tab1.col1 = tab2.col2; > > > Operation Object Name Rows Bytes Cost Object Node In/Out PStart > PStop > > SELECT STATEMENT Optimizer Mode=CHOOSE 1 G 237 > > HASH JOIN 1 G 20G 237 > INDEX FAST FULL SCAN PK1 5 K 11 K 3 > > TABLE ACCESS FULL TABLE2 366 K 4 M 231 > > > > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.net > -- > Author: <[EMAIL PROTECTED] > INET: [EMAIL PROTECTED] > > Fat City Network Services -- 858-538-5051 http://www.fatcity.com > San Diego, California -- Mailing list and web hosting services > --------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > the message BODY, include a line containing: UNSUB ORACLE-L > (or the name of mailing list you want to be removed from). You may > also send the HELP command for other information (like subscribing). > -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: <[EMAIL PROTECTED] INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
